Air Plan Approval; Michigan; Clean Data Determination for the Berrien, MI and Muskegon, MI Areas for the 2015 Ozone Standards
Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register Oct. 9, 2026. Document 2026-20736. Updated Nov. 5, 2026.
- What it does
The U.S. Environmental Protection Agency (EPA) is determining under the Clean Air Act (CAA) that the Berrien County and Muskegon County, Michigan nonattainment areas have attained the 2015 ozone National Ambient Air Quality Standards (NAAQS). This determination, informally known as a clean data determination, is based upon complete, quality assured, and certified ambient air monitoring data for the 2023-2025 design value period showing that the areas achieved attainment of the 2015 ozone NAAQS. This clean data determination also relies upon the Michigan Department of Environment, Great Lakes, and Energy's (EGLE's) exceptional events request submitted to the EPA on December 26, 2025, and which the EPA concurred on January 12, 2026. As a result of this determination, the EPA is suspending the requirements for the Berrien and Muskegon areas to submit attainment demonstrations and associated Reasonably Available Control Measures (RACM), Reasonable Further Progress (RFP) plans, contingency measures for failure to attain or make reasonable progress, and other planning State Implementation Plans (SIPs) related to attainment of the 2015 ozone NAAQS for as long as the areas continue to attain the 2015 ozone NAAQS.
The Environmental Protection Agency's summary, as published in the Federal Register.
- What changed in the regulation
1 part of Title 40 of the Code of Federal Regulations:
Wording on eCFR: the day before it took effect and from the day it took effect (first part listed).
- Compared with
The Environmental Protection Agency has published 238 final rules in 2026 so far, compared with 263 in all of 2025.
Counted by the Tribune from Federal Register records since Jan. 1, 2025.
- What happens next and when
This final rule is effective on October 9, 2026.
The agency's dates, word for word.
The record as published
| Document number | 2026-20736 |
|---|---|
| Action | Final rule. |
| Agencies | Environmental Protection Agency |
| Published | Oct. 9, 2026 |
| Effective date | Oct. 9, 2026 |
| Docket | EPA-R05-OAR-2026-1354 |
Source: the Federal Register (public domain). The document in the Federal Register